markoebert wrote:
New text message defaults to recipients email address instead of her iphone number. How do I change that? I have my default in Message to my iPhone
Only the recipient can change that. The need to go to Settings>Apps>Messages (or Settings>Messages on phones that have iOS 15 or earlier). Then go to Send & Recieve and select the mobile number/email addresses where they want to receive iMessages.
Note, if your friend has an Android phone and an iPad/Mac, iMessages will get sent to their Apple Account email.